WD1004-27X, WD1004A-27X Hard Disk/Floppy Controller Settings and Configuration
WESTERN DIGITAL CORPORATION
WD1004-27X, WD1004A-27X
Replaces the WD1002-27X and WD1002A-27X respectively
Data bus: 8-bit, PC/AT
Size: Half-length, full-height card
Hard drives supported: 2 RLL ST506/412 drives
Floppy drives supported: None
Maximum heads/cyl.: 16 heads and 1024 cylinders
CONNECTIONS | |
Function | Location |
34-pin control cable connector-hard drive | J1 |
20-pin data cable connector-drive 0 | J2 |
20-pin data cable connector-drive 1 | J3 |
5-pin connector-DC power | J4 |
4-pin connector-drive active LED | J5 |
USERS CONFIGURABLE SETTINGS | |||
Function | Location | Setting | |
| » | Hard drive Interrupt request is IRQ5 | W27 | closed |
Hard drive Interrupt request is IRQ2 | W27 | open | |
BIOS DRIVE TYPE TABLE - (WD1004-27X ONLY) | ||||||||
Table # | W17 | W18 | W19 | W20 | Cap. | Hds. | Cyls. | |
0 | closed | closed | closed | closed | 65MB | 6 | 820 | |
1 | open | closed | open | closed | 42MB | 4 | 782 | |
2 | closed | open | closed | open | 21MB | 2 | 782 | |
| » | 3 | open | open | open | open | 32MB | 4 | 615 |
I/O PORT & BIOS ADDRESS JUMPERS - (WD1004-27X ONLY) | ||||
I/O Port Address | BIOS Address | W21 | W22 | |
| » | 320-323h | C800-C9FFh | open | open |
324-327h | CA00-CBFFh | closed | open | |
328-32Bh | CC00-CDFFh | open | closed | |
32C-32Fh | CE00-CFFFh | closed | closed | |
SECTORS AND CONFIGURATION OPTION | |||||
Table | Sectors | Translate | Dynamic | W25 | W26 |
RLL | 17 | yes | no | closed | open |
RLL | 26 | no | yes | open | closed |
MISCELLANEOUS TECHNICAL NOTES |
This controller has a built-in low-level format program. To enter the program run the DEBUG utility supplied with DOS and at the prompt enter: G=C800:5. |
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